content: package org.alien4cloud.bootstrap;
  
  import javax.annotation.Resource;
  
  import lombok.extern.slf4j.Slf4j;
  
  import org.springframework.beans.factory.annotation.Value;
  import org.springframework.boot.context.embedded.EmbeddedServletContainerInitializedEvent;
  import org.springframework.context.ApplicationContext;
  import org.springframework.context.ApplicationListener;
  import org.springframework.context.event.ContextRefreshedEvent;
  import org.springframework.stereotype.Component;
  
  import alien4cloud.events.HALeaderElectionEvent;
  
  /**
   * When HA is not enabled, we need to wake up everything on this instance as if it was the leader.
   *
   * TODO It may be better/simpler to process EmbeddedServletContainerInitializedEvent rather than Context
   */
  @Component
  @Slf4j
  public class DisabledHAManager implements ApplicationListener<ContextRefreshedEvent> {
  
      @Value("${ha.ha_enabled:#{false}}")
      private boolean haEnabled;
  
      @Resource
      private ApplicationContext alienContext;
  
      @Override
      public void onApplicationEvent(ContextRefreshedEvent event) {
          if (!haEnabled && event.getApplicationContext() == alienContext) {
              // child context may also dispatch context refresh event, we just want to process the ones of the main context.
              log.info("HA is not enabled, this instance is the leader de facto");
              alienContext.publishEvent(new HALeaderElectionEvent(this, true));
          }
      }
  }